Cita APA (7th ed.)

Cram, G. A. (1931). The key to prosperity: Abundance: leisure contentment. Pitman.

Cita Chicago (17th ed.)

Cram, G. A. The Key to Prosperity: Abundance: Leisure Contentment. London: Pitman, 1931.

Cita MLA (8th ed.)

Cram, G. A. The Key to Prosperity: Abundance: Leisure Contentment. Pitman, 1931.