Gaya APA
George, C, S, J. (1985).
Supervision in action : the art of managing others (4th ed.).
Virginia:
Prentice Hall.
Gaya MLA
George, Claude, S., Jr.
"Supervision in action : the art of managing others".
4th ed.
Virginia:
Prentice Hall,
1985.
Buku/Printed Material.