Gaya APA
GILLEY, J, W., EGGLAND, S, A. (1989).
Principles of human resource develeopment .
Reading Massachusetts:
Addison-Wesley.
Gaya MLA
GILLEY, Jerry, W.., EGGLAND, Steven, A..
"Principles of human resource develeopment".
Reading Massachusetts:
Addison-Wesley,
1989.
Buku.