Gaya APA
Singer, P. (2010).
The life you can save: How to do your part to end world poverty. .
New York:
New York Random House Trade Paperbacks.
Gaya MLA
Singer, Peter.
"The life you can save: How to do your part to end world poverty. ".
New York:
New York Random House Trade Paperbacks,
2010.
Buku.