APA (7 ম সংস্করণ) উদ্ধৃতি

Zhao, S., & Lao, D. (2021). Fundamental theories and their applications of the calculus of variations. Springer. https://doi.org/10.1007/978-981-15-6070-5

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Zhao, Shanshan, এবং Dazhong Lao. Fundamental Theories and Their Applications of the Calculus of Variations. Singapore: Springer, 2021. https://doi.org/10.1007/978-981-15-6070-5.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Zhao, Shanshan, এবং Dazhong Lao. Fundamental Theories and Their Applications of the Calculus of Variations. Springer, 2021. https://doi.org/10.1007/978-981-15-6070-5.