Cita APA (7th ed.)

Marsh, F. L. (1976). Variation and fixity in nature: The meaning of diversity and discontinuity in the world of living things, and their bearing on creation and evolution. Pacific Press.

Cita Chicago (17th ed.)

Marsh, Frank L. Variation and Fixity in Nature: The Meaning of Diversity and Discontinuity in the World of Living Things, and Their Bearing on Creation and Evolution. Mountain View, CA: Pacific Press, 1976.

Cita MLA (9th ed.)

Marsh, Frank L. Variation and Fixity in Nature: The Meaning of Diversity and Discontinuity in the World of Living Things, and Their Bearing on Creation and Evolution. Pacific Press, 1976.