APA (7th ed.) Citation

MacCallum, A. W. (1929). White Pine Blister Rust.

Chicago Style (17th ed.) Citation

MacCallum, A. W. White Pine Blister Rust. Ottawa, 1929.

MLA (9th ed.) Citation

MacCallum, A. W. White Pine Blister Rust. 1929.

Warning: These citations may not always be 100% accurate.