APA引文

Helliwell,J F. (1976). Aggregate investment: Selected readings. Penguin Education.

Chicago Edition Citation

Helliwell,J F. Aggregate Investment: Selected Readings. England: Penguin Education, 1976.

MLA引文

Helliwell,J F. Aggregate Investment: Selected Readings. Penguin Education, 1976.

警告：這些引文格式不一定是100％准確.