Gaya APA

Holtz, H., Zahn, D. (1976). How to succeed as an independent consultant (ed. 1. cet. 1). Amerika: Wily lso Publishes.

Gaya MLA

Holtz, Herman., Zahn, David. "How to succeed as an independent consultant". ed. 1. cet. 1 Amerika: Wily lso Publishes, 1976. Buku.