Wallace, Robert
Amsterdam Time Life 1974
Buku Teks
Lind, Andrew W.
University of Hawaii Press, 1955
Buku Teks
Kuykendall, Ralph S.
Prentice-Hall, 1961
Buku Teks
edited by John F. McDermott, Wen-Shing Tseng, Thomas W. Maretzki
University of Hawaii Press, 1980
Buku Teks
Conroy, Hilary
University of California Press, 1953
Buku Teks