APA (7th ed.) Citation

Olmsted, J. M. H. (1959). Real variables: An introduction to the theory of functions. Appleton-Century-Crofts.

Chicago Style (17th ed.) Citation

Olmsted, John M. H. Real Variables: An Introduction to the Theory of Functions. New York: Appleton-Century-Crofts, 1959.

MLA (9th ed.) Citation

Olmsted, John M. H. Real Variables: An Introduction to the Theory of Functions. Appleton-Century-Crofts, 1959.