APA
Shakya S. R., Aryal M. R., Chitrakar P., Adhikari D. C. & Manandhar I. M. (2071). a textbook of biology : grade- XI. Kathmandu: Sukunda Pustak Bhawan.
Chicago
Shakya Shubba Ratna, Aryal Mukti Ram, Chitrakar Prabha, Adhikari Dinesh Chandra and Manandhar Indra Maiya. 2071. a textbook of biology : grade- XI. Kathmandu: Sukunda Pustak Bhawan.
Harvard
Shakya S. R., Aryal M. R., Chitrakar P., Adhikari D. C. and Manandhar I. M. (2071). a textbook of biology : grade- XI. Kathmandu: Sukunda Pustak Bhawan.
MLA
Shakya Shubba Ratna, Aryal Mukti Ram, Chitrakar Prabha, Adhikari Dinesh Chandra and Manandhar Indra Maiya. a textbook of biology : grade- XI. Kathmandu: Sukunda Pustak Bhawan. 2071.
