APA Style
PIPER, John. (2013).
On relationships .
New York:
.
Chicago Style
PIPER, John.
On relationships.
New York:
,
2013.
Text.
MLA Style
PIPER, John.
On relationships.
New York:
,
2013.
Text.
Turabian Style
PIPER, John.
On relationships.
New York:
,
2013.
Print.