Cita APA (7a ed.)

Bullough, W. S. (1967). The evolution of differentiation. Academic Press.

Cita Chicago Style (17a ed.)

Bullough, William Sydney. The Evolution of Differentiation. London [etc.]: Academic Press, 1967.

Cita MLA (9a ed.)

Bullough, William Sydney. The Evolution of Differentiation. Academic Press, 1967.