APA (7th ed.) Citation

Clausen, H. (1991). Electronic Mail as a Tool for the Information Professional.

Chicago Style (17th ed.) Citation

Clausen, Helge. Electronic Mail as a Tool for the Information Professional. 1991.

MLA (9th ed.) Citation

Clausen, Helge. Electronic Mail as a Tool for the Information Professional. 1991.

Warning: These citations may not always be 100% accurate.