APA (7th ed.) Citation

(1987). Geologic map of the Newark 1 ̊x 2 ̊quadrangle, New Jersey, Pennsylvania and New York. U.S. Geolog. Survey.

Chicago Style (17th ed.) Citation

Geologic Map of the Newark 1 ̊x 2 ̊quadrangle, New Jersey, Pennsylvania and New York. Reston, Va. u.a: U.S. Geolog. Survey, 1987.

MLA (9th ed.) Citation

Geologic Map of the Newark 1 ̊x 2 ̊quadrangle, New Jersey, Pennsylvania and New York. U.S. Geolog. Survey, 1987.