APA aipamena

Harman, T. L., & Allen, C. E. (1981). Guide to the National Electrical Code (1981 ed.). Prentice-Hall.

Chicago Style aipamena

Harman, Thomas L., and Charles E. Allen. Guide to the National Electrical Code. 1981 ed. Englewood Cliffs, N.J: Prentice-Hall, 1981.

MLA aipamena

Harman, Thomas L., and Charles E. Allen. Guide to the National Electrical Code. 1981 ed. Prentice-Hall, 1981.