Keesing, Roger M.
Holt, Rinchart and Winston, 1971
Buku Teks
Kottak, Conrad Phillip
McGraw-Hill, 2011
Buku Teks
Swartz, Marc J.
Wiley, 1976
Buku Teks
Sojak, Radoslaw
Internationaler Verlag der Wissenschaften, 2018
Buku Teks
Ferraro, Gary P.
Cengage Learning, 2018
Buku Teks