APA-ийн эшлэл(7 дахь хэвлэлт)

Ward , r. P. . .. (1969). Introduction to electrical engineering (3rd ed.). Prentice Hall.

Чикаго-гийн эшлэл (17 дахь хэвлэлт)

Ward , robert P. Introduction to Electrical Engineering. 3rd ed. New Delhi: Prentice Hall, 1969.

MLA -ийн эшлэл (9 дэх хэвлэлт)

Ward , robert P. Introduction to Electrical Engineering. 3rd ed. Prentice Hall, 1969.