Gaya APA
Sayles, W., F., D., &., L., R. (1978).
HOW MANAGERS MOTIVATE (THE IMPERATIVES OF SUPERVISION) .
USA:
Mc Graw Hill.
Gaya MLA
Sayles, William, F., Dowling, &, Leonard, R..
"HOW MANAGERS MOTIVATE (THE IMPERATIVES OF SUPERVISION)".
USA:
Mc Graw Hill,
1978.
Buku Inti.