Kaufman, Robert K., author
McGraw-Hill, 2008
Buku Teks
Cunningham, William P., author
McGraw-Hill, 2015
Buku Teks
Henry W. Art, general editor ; foreword by F. Herbert Bormann ; contributing editors, Daniel Botkin [and others]
Henry Holt, 1993
Buku Referensi
Arms, Karen, author
Saunders College Publishing, 1990
Buku Teks
Cunningham, William P., author
McGraw-Hill, 2002
Buku Teks