Gaya APA
Lepp, Ignace. (1971).
The Challenges of life .
New York:
Image Books.
Gaya Chicago
Lepp, Ignace.
The Challenges of life.
New York:
Image Books,
1971.
Text.
Gaya MLA
Lepp, Ignace.
The Challenges of life.
New York:
Image Books,
1971.
Text.
Gaya Turabian
Lepp, Ignace.
The Challenges of life.
New York:
Image Books,
1971.
Print.