Cita APA (7th ed.)

Leung, K., & Chen, D. L. (1967). Elementary set theory. Hong Kong University Press.

Cita Chicago (17th ed.)

Leung, Kam-tim, i Doris Lai-chue Chen. Elementary Set Theory. Hong Kong: Hong Kong University Press, 1967.

Cita MLA (9th ed.)

Leung, Kam-tim, i Doris Lai-chue Chen. Elementary Set Theory. Hong Kong University Press, 1967.