APA

Fried G., Neilson B. R., . (1990). Schaum's outline of theory and problems of biology. New York: McGraw-Hill.

Chicago

Fried George, Neilson Boyd Robert, . 1990. Schaum's outline of theory and problems of biology. New York: McGraw-Hill.

Harvard

Fried G., Neilson B. R., . (1990). Schaum's outline of theory and problems of biology. New York: McGraw-Hill.

MLA

Fried George, Neilson Boyd Robert, . Schaum's outline of theory and problems of biology. New York: McGraw-Hill. 1990.