Gaya APA

;, M, R, S. (1969). Schaum's Outline Series : Theory and Problems of Real Variables . United States of America: McGraw-Hill Book Company, Inc.

Gaya MLA

;, Murray, R., Spiegel. "Schaum's Outline Series : Theory and Problems of Real Variables". United States of America: McGraw-Hill Book Company, Inc, 1969. Buku.