Gaya APA
Weihrich, H., K., C., O., D., H. (1984).
MANAGEMENT EIGHTH EDITION (Eighth Edition).
USA:
Mc-Graw Hill.
Gaya MLA
Weihrich, Harold, Koontz,, Cyril, O, Donnell,, Heinz.
"MANAGEMENT EIGHTH EDITION".
Eighth Edition
USA:
Mc-Graw Hill,
1984.
Buku Inti.