Dibenedetto, David C., author
iUniverse, Inc, 2008
Buku Teks
Tobias, Ronald B.
Writer's Digest Books, 1997
Buku Teks
Lunde, Paul, author
Dorling Kindersley, 2004
Buku Teks
Prentice-Hall, 1994
Buku Teks
Shabrina Salsabila Putri, author
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2022
UI - Tugas Akhir