Sagan, H. (1969). Introduction to the calculus of variations. McGraw-Hill Book Co., Inc.
Chicagoスタイル(17版)引用形式Sagan, Hans. Introduction to the Calculus of Variations. New York: McGraw-Hill Book Co., Inc, 1969.
MLA(9版)引用形式Sagan, Hans. Introduction to the Calculus of Variations. McGraw-Hill Book Co., Inc, 1969.
警告: この引用は必ずしも正確ではありません.