APA Style
Mandino, OG. (1972).
The greatest secret in the world (1981).
:
Frederick Fell.
Chicago Style
Mandino, OG.
The greatest secret in the world.
1981
:
Frederick Fell,
1972.
Text.
MLA Style
Mandino, OG.
The greatest secret in the world.
1981
:
Frederick Fell,
1972.
Text.
Turabian Style
Mandino, OG.
The greatest secret in the world.
1981
:
Frederick Fell,
1972.
Print.