APA-viite

Powell, R. E., & Shah, S. M. (1972). Summability theory and its applications.

Chicago-tyylinen lähdeviittaus

Powell, R E., ja S M. Shah. Summability Theory and Its Applications. Van Nostrand Reinhold Co., London, 1972.

MLA-viite

Powell, R E., ja S M. Shah. Summability Theory and Its Applications. 1972.