APA

Levy C. K., . (1973). Elements of biology. : Appleton Century Crofts, New York.

Chicago

Levy Charles K, . 1973. Elements of biology. : Appleton Century Crofts, New York.

Harvard

Levy C. K., . (1973). Elements of biology. : Appleton Century Crofts, New York.

MLA

Levy Charles K, . Elements of biology. : Appleton Century Crofts, New York. 1973.