APA (7th ed.) Citation

Gunther, A. (1962). Microphotography in the library. Unesco.

Chicago Style (17th ed.) Citation

Gunther, Alfred. Microphotography in the Library. [Paris]: Unesco, 1962.

MLA (9th ed.) Citation

Gunther, Alfred. Microphotography in the Library. Unesco, 1962.

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