APA

Natanson I. P., Boron L. F. & Hewitt E. (1961). Theory of functions of a real variable 1 : teoria functsiy veshchestvennoy peremennoy. New York: Frederick Ungar Publishing.

Chicago

Natanson I P, Boron Leo F and Hewitt Edwin. 1961. Theory of functions of a real variable 1 : teoria functsiy veshchestvennoy peremennoy. New York: Frederick Ungar Publishing.

Harvard

Natanson I. P., Boron L. F. and Hewitt E. (1961). Theory of functions of a real variable 1 : teoria functsiy veshchestvennoy peremennoy. New York: Frederick Ungar Publishing.

MLA

Natanson I P, Boron Leo F and Hewitt Edwin. Theory of functions of a real variable 1 : teoria functsiy veshchestvennoy peremennoy. New York: Frederick Ungar Publishing. 1961.