APA引文

Martens, H. R. (1969). Introduction to systems theory. Charles E Merrill.

Chicago Edition Citation

Martens, Hinrich R. Introduction to Systems Theory. U S A: Charles E Merrill, 1969.

MLA引文

Martens, Hinrich R. Introduction to Systems Theory. Charles E Merrill, 1969.

警告：這些引文格式不一定是100％准確.