APA-viite

Loper, O. E. (1978). Direct current fundamentals. Van Nostrand Reinhold Company.

Chicago-tyylinen lähdeviittaus

Loper, Orla E. Direct Current Fundamentals. New York: Van Nostrand Reinhold Company, 1978.

MLA-viite

Loper, Orla E. Direct Current Fundamentals. Van Nostrand Reinhold Company, 1978.