Worcester, P. G. (1969). Textbook of geomorphology (2nd ed.). Van Nostrand.
Chicagoスタイル(17版)引用形式Worcester, Philip G. Textbook of Geomorphology. 2nd ed. New york: Van Nostrand, 1969.
MLA(9版)引用形式Worcester, Philip G. Textbook of Geomorphology. 2nd ed. Van Nostrand, 1969.
警告: この引用は必ずしも正確ではありません.