Gaya APA
Singer, Peter. (2011).
Practical ethics .
New York:
Cambridge University Press.
Gaya Chicago
Singer, Peter.
Practical ethics.
New York:
Cambridge University Press,
2011.
e-book.
Gaya MLA
Singer, Peter.
Practical ethics.
New York:
Cambridge University Press,
2011.
e-book.
Gaya Turabian
Singer, Peter.
Practical ethics.
New York:
Cambridge University Press,
2011.
e-book.