Krutilla, John V., author
Johns Hopkins University Press, 1958
Buku Teks
Nina Rasmeika Pratiwi, author
Universitas Indonesia, 2018
UI - Skripsi (Membership)
Wallich, Henry C., author
Harvard University Press, 1960
Buku Teks
Wong, John, author
Singapore university press, 2002
Buku Teks
Armstrong, Muriel
Prentice Hall of Canada, 1977
Buku Teks