Gaya APA

Yerkes, L, A. (2002). Beans four principles for running a business in good times or bad : a business fable taken from real life / Leslie A. Yerkes, Decker Charles . San Francisco: Jossey-Bass.

Gaya MLA

Yerkes, Leslie, A.. "Beans four principles for running a business in good times or bad : a business fable taken from real life / Leslie A. Yerkes, Decker Charles". San Francisco: Jossey-Bass, 2002. Buku.