Gaya APA

Drucker, P, F. (1985). The Effective Executive Eksekutif Efektif (1). JAKARTA: PT. Elex Media Komputindo.

Gaya MLA

Drucker, Peter, F.. "The Effective Executive Eksekutif Efektif". 1 JAKARTA: PT. Elex Media Komputindo, 1985. Text.