Dyfyniad APA

Ahlgren, C. E. (1968). Breeding for resistance to white pine blister rust. Quetico-Superior Wilderness Research Center.

Dyfyniad Arddull Chicago

Ahlgren, C. E. Breeding for Resistance to White Pine Blister Rust. Ely, Minn.: Quetico-Superior Wilderness Research Center, 1968.

Dyfyniad MLA

Ahlgren, C. E. Breeding for Resistance to White Pine Blister Rust. Quetico-Superior Wilderness Research Center, 1968.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.