APA (7th ed.) Citation

Peterson, G. N. (2012). Cartographer's toolkit: Colors, typography, patterns. PetersonGIS.

Chicago Style (17th ed.) Citation

Peterson, Gretchen N. Cartographer's Toolkit: Colors, Typography, Patterns. Fort Collins, Colo.: PetersonGIS, 2012.

MLA (9th ed.) Citation

Peterson, Gretchen N. Cartographer's Toolkit: Colors, Typography, Patterns. PetersonGIS, 2012.

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