Gaya APA

Greenbaum, T, L. (1990). The Consultants Manual: A Complete Guide to Building a Succesfull Consulting Practice . California: John Wiley and Sons.

Gaya MLA

Greenbaum, Thomas, L.. "The Consultants Manual: A Complete Guide to Building a Succesfull Consulting Practice". California: John Wiley and Sons, 1990. Hibah Buku Dra. Anita Lestari,.