Style de citation APA (7e éd.)

Não informado. Topographic and Geologic Atlas of Pennsylvania. Pennsylvania Geological Survey.

Style de citation Chicago (17e éd.)

Não informado. Topographic and Geologic Atlas of Pennsylvania. Harrisburg, Pa: Pennsylvania Geological Survey.

Style de citation MLA (8e éd.)

Não informado. Topographic and Geologic Atlas of Pennsylvania. Pennsylvania Geological Survey.

Attention : ces citations peuvent ne pas être correctes à 100%.