Lewis, R. (1992). Life: Beginnings of life, animal life, plant life, evolution of life, behavior and ecology of life. Wm. C. Brown.
Citace podle Chicago (17th ed.)Lewis, Ricki. Life: Beginnings of Life, Animal Life, Plant Life, Evolution of Life, Behavior and Ecology of Life. Dubuque, IA: Wm. C. Brown, 1992.
Citace podle MLA (9th ed.)Lewis, Ricki. Life: Beginnings of Life, Animal Life, Plant Life, Evolution of Life, Behavior and Ecology of Life. Wm. C. Brown, 1992.
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