Gaya APA
Readers Digest Best of America. (2011).
Amerika:
Bayer Health Care.
Gaya Chicago
Readers Digest Best of America.
.
Amerika:
Bayer Health Care,
2011.
Text.
Gaya MLA
Readers Digest Best of America.
.
Amerika:
Bayer Health Care,
2011.
Text.
Gaya Turabian
Readers Digest Best of America.
Amerika:
Bayer Health Care,
2011.
Print.