APA استشهاد

Varma, K. D., & Chandla, V. K. (1990). Potato aphids and their management. CPRI.

استشهاد بنمط شيكاغو

Varma, K D., و V K. Chandla. Potato Aphids and Their Management. Shimla: CPRI, 1990.

MLA استشهاد

Varma, K D., و V K. Chandla. Potato Aphids and Their Management. CPRI, 1990.