APA Style
Anderson, Sally. (1979).
Helena Curtis, biologi .
New York:
Worth Publisher.
Chicago Style
Anderson, Sally.
Helena Curtis, biologi.
New York:
Worth Publisher,
1979.
Text.
MLA Style
Anderson, Sally.
Helena Curtis, biologi.
New York:
Worth Publisher,
1979.
Text.
Turabian Style
Anderson, Sally.
Helena Curtis, biologi.
New York:
Worth Publisher,
1979.
Print.