/**
 * Represents bibliographic information for books.
 */
public class Book implements Publication {
  private final String title, author, publisher, location;
  private final int year;
  private final TypeOfBook type;

  /**
   * Constructs a {@code Book} object.
   *
   * @param title     the title of the book
   * @param author    the author of the book
   * @param type      the type of the book
   * @param publisher the publisher of the book
   * @param location  the location of the publisher
   * @param year      the year of publication
   */
  public Book(String title, String author, TypeOfBook type, String publisher,
              String location, int year) throws IllegalArgumentException {
    if (year < 0) {
      throw new IllegalArgumentException("Year of publication cannot be a "
                                         + "negative number");
    }
    this.title = title;
    this.author = author;
    this.type = type;
    this.publisher = publisher;
    this.location = location;
    this.year = year;
  }

  @Override
  public String citeApa() {
    return author + " (" + year + "). " + title + ". " +
           location + ": " + publisher + ".";
  }

  @Override
  public String citeMla() {
    return author + ". " + title + ". " + location + ": " +
           publisher + ", " + year + ".";
  }


}