Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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