Gaya APA

Fried, George H., Hademenos, George J.. (1999). Theory and problem of biology (2nd ed). New York: McGraw-Hill.

Gaya Chicago

Fried, George H., Hademenos, George J.. Theory and problem of biology. 2nd ed New York: McGraw-Hill, 1999. Text.

Gaya MLA

Fried, George H., Hademenos, George J.. Theory and problem of biology. 2nd ed New York: McGraw-Hill, 1999. Text.

Gaya Turabian

Fried, George H., Hademenos, George J.. Theory and problem of biology. 2nd ed New York: McGraw-Hill, 1999. Print.