APA (7th ed.) Citation

Geological Survey (U.S.). (1994). Fort Wayne, Indiana: 1:100 000-scale metric topographic map : 30 x 60 minute series (topographic) (Map edited 1994.). The Survey.

Chicago Style (17th ed.) Citation

Geological Survey (U.S.). Fort Wayne, Indiana: 1:100 000-scale Metric Topographic Map : 30 X 60 Minute Series (topographic). Map edited 1994. Reston, Va.: The Survey, 1994.

MLA (9th ed.) Citation

Geological Survey (U.S.). Fort Wayne, Indiana: 1:100 000-scale Metric Topographic Map : 30 X 60 Minute Series (topographic). Map edited 1994. The Survey, 1994.