Cita APA (7th ed.)

Lieber, L. R., & Lieber, H. G. (1953). Infinity. Rinehart.

Cita Chicago (17th ed.)

Lieber, Lillian R., i Hugh Gray Lieber. Infinity. Nueva York: Rinehart, 1953.

Cita MLA (9th ed.)

Lieber, Lillian R., i Hugh Gray Lieber. Infinity. Rinehart, 1953.