Παραπομπή APA

Spiegel, M. (1969). Real Variables. McGraw Hill Book company.

Παραπομπή Chicago Style

Spiegel, M.R. Real Variables. New York: McGraw Hill Book company, 1969.

Παραπομπή MLA

Spiegel, M.R. Real Variables. McGraw Hill Book company, 1969.