APA

(1969). Middle States Geographer. York, Pa. [u.a.]: Middle States Division of the Association of American Geographers.

Chicago

1969. Middle States Geographer. York, Pa. [u.a.]: Middle States Division of the Association of American Geographers.

Harvard

(1969). Middle States Geographer. York, Pa. [u.a.]: Middle States Division of the Association of American Geographers.

MLA

Middle States Geographer. York, Pa. [u.a.]: Middle States Division of the Association of American Geographers. 1969.