APA (7th ed.) Citation

Internationale Geographische Union. (1993). Bulletin / International Geographical Union. IGU.

Chicago Style (17th ed.) Citation

Internationale Geographische Union. Bulletin / International Geographical Union. Washington, DC: IGU, 1993.

MLA (9th ed.) Citation

Internationale Geographische Union. Bulletin / International Geographical Union. IGU, 1993.

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