APA সাইটেশন

Knowler, F., & Watkin, J. (1960). Practical Course in Agricultural Chemistry (2.). Macmillan and Company Ltd.

শিকাগো স্টাইলে সাইটেশন

Knowler, Frank, এবং J.Elphin Watkin. Practical Course in Agricultural Chemistry. 2. London: Macmillan and Company Ltd, 1960.

এমএলএ সাইটেশন

Knowler, Frank, এবং J.Elphin Watkin. Practical Course in Agricultural Chemistry. 2. Macmillan and Company Ltd, 1960.