Suzuki-Parker, Asuka, author
Springer, 2012
eBooks
Holden, K., author
Cambridge University Press, 1990
Buku Teks
Pindyck, Robert S., author
McGraw-Hill, 1991
Buku Teks
Rogers, Andrei
Sage Publications, 1985
Buku Teks
Universitas Indonesia, 1989
UI - Skripsi (Membership)