Some different things with a module in RequireJS.

people.js

define(["jquery", "knockout", "bootstrap"], function($, ko) {
        var lessons = function() {
            // ReSharper disable once InconsistentNaming
            var bus = new ko.subscribable();
            l.Bus = bus;

            var person = function(firstName, lastName) {
                var self = this;

                self.firstName = ko.observable(firstName);
                self.lastName = ko.observable(lastName);
            };

            var peopleListViewModel = function() {
                var self = this;

                bus.subscribe(function() {
                    self.loadPeople();
                }, self, "Person Added");

                self.people = ko.observableArray([]);

                self.loadPeople = function() {
                    $.getJSON("/people", "", function(data) {
                        self.people.removeAll();

                        $.each(data, function(key, value) {
                            self.people.push(new person(value.FirstName, value.LastName));
                        });
                    });
                };

                self.showAddPerson = function() {
                    $("#addPersonModal").modal("show");
                };
            };
            l.PeopleListViewModel = peopleListViewModel;

            var addPersonViewModel = function() {
                var self = this;

                self.firstName = ko.observable("");
                self.lastName = ko.observable("");

                self.addPerson = function() {
                    var personToAdd = ko.toJSON(self);

                    $.ajax({
                        method: "POST",
                        url: "/people",
                        data: personToAdd,
                        contentType: "application/json; charset=utf-8",
                        success: function() {
                            bus.notifySubscribers({}, "Person Added");
                            $("#addPersonModal").modal("hide");
                            self.firstName("");
                            self.lastName("");
                        },
                    });
                };
            };
            l.AddPersonViewModel = addPersonViewModel;
        };

    return lessons;
});