APA Style
Curtis, Helena. (1983).
Biology (4th ed).
New York:
WORTH PUBLISHERS.
Chicago Style
Curtis, Helena.
Biology.
4th ed
New York:
WORTH PUBLISHERS,
1983.
.
MLA Style
Curtis, Helena.
Biology.
4th ed
New York:
WORTH PUBLISHERS,
1983.
.
Turabian Style
Curtis, Helena.
Biology.
4th ed
New York:
WORTH PUBLISHERS,
1983.
.