APA引文

Opdycke, J. B. (1941). Harper's English grammar. Harper & Brothers.

Chicago Style (17th ed.) Citation

Opdycke, John B. Harper's English Grammar. New York ; London: Harper & Brothers, 1941.

MLA引文

Opdycke, John B. Harper's English Grammar. Harper & Brothers, 1941.

警告：这些引文格式不一定是100％准确.