APA Style
Mabry, R, H., Ulbrich, H, H. (1989).
Introduction to Economic Principles (International).
Singapore:
McGraw Hill.
MLA Style
Mabry, Rodney, H.., Ulbrich, Holley, H..
"Introduction to Economic Principles".
International
Singapore:
McGraw Hill,
1989.
Koleksi Buku Teks.