APA
Zwicker K., . (1990). Student study guide in genetics. Dubuque: Brown & Benchmark Publisher.
Chicago
Zwicker Ken, . 1990. Student study guide in genetics. Dubuque: Brown & Benchmark Publisher.
Harvard
Zwicker K., . (1990). Student study guide in genetics. Dubuque: Brown & Benchmark Publisher.
MLA
Zwicker Ken, . Student study guide in genetics. Dubuque: Brown & Benchmark Publisher. 1990.