Cita APA (7a ed.)

Haeckel, E., & McCabe, J. (1905). The wonders of life: A popular study of biological philosophy. Harper & brothers.

Cita Chicago Style (17a ed.)

Haeckel, Ernst, y Joseph McCabe. The Wonders of Life: A Popular Study of Biological Philosophy. New York, London: Harper & brothers, 1905.

Cita MLA (8a ed.)

Haeckel, Ernst, y Joseph McCabe. The Wonders of Life: A Popular Study of Biological Philosophy. Harper & brothers, 1905.