Franklin

MLA

Loomis, William F. Four Billion Years : an Essay On the Evolution of Genes and Organisms. Sunderland, Mass.: Sinauer Associates, Inc., 1988.

APA

Loomis, W. F. (1988). Four billion years : an essay on the evolution of genes and organisms. Sunderland, Mass.: Sinauer Associates, Inc.

Chicago

Loomis, William F. Four Billion Years: An Essay On the Evolution of Genes and Organisms. Sunderland, Mass.: Sinauer Associates, Inc., 1988.