Stettler, Howard F.
Prentice-Hall, 1967
Buku Teks
Stettler, Howard F.
Prentice-Hall, 1982
Buku Teks
Cutforth, Arthur E.
Gee and Company, 1971
Buku Teks
Ray, J.C.
Holt, Rinehart and Winston, 1964
Buku Teks
Deviana Pratami Putri
Fakultas Ekonomi dan Bisnis Universitas Indonesia, 2021
UI - Tesis (Membership)