APA aipamena

Oppenheim, E. P. (1923). The seven conundrums. Little, Brown, and Co..

Chicago Style aipamena

Oppenheim, E. Phillips. The Seven Conundrums. Boston: Little, Brown, and Co., 1923.

MLA aipamena

Oppenheim, E. Phillips. The Seven Conundrums. Little, Brown, and Co., 1923.