Gaya APA
Audesirk, G., Audesirk, T. (1989).
Biology: Life on Earth, Secon Edition (2nd Ed.).
United State of America:
Palgrave Macmillan.
Gaya MLA
Audesirk, Gerald., Audesirk, Teresa.
"Biology: Life on Earth, Secon Edition".
2nd Ed.
United State of America:
Palgrave Macmillan,
1989.
Text.