Gaya APA
GILBIN, L. (1956).
How to have confidence and power in dealing with people .
Englewood Cliffs, N.J:
Prentice-Hall.
Gaya MLA
GILBIN, Les.
"How to have confidence and power in dealing with people".
Englewood Cliffs, N.J:
Prentice-Hall,
1956.
Buku.