Gaya APA
Covey, S, R. (2006).
The Speed of Trust: The one thing that change everything .
New York:
The Free Press.
Gaya MLA
Covey, Stephen, R..
"The Speed of Trust: The one thing that change everything".
New York:
The Free Press,
2006.
Hibah Buku Dra. Anita Lestari,.