APA引文

Petrovsky, I. G. (1964). Lectures on partial differential equations.

Chicago Edition Citation

Petrovsky, I G. Lectures on Partial Differential Equations. Dover Publication, New York, 1964.

MLA引文

Petrovsky, I G. Lectures on Partial Differential Equations. 1964.

警告：這些引文格式不一定是100％准確.