APA (7 ম সংস্করণ) উদ্ধৃতি

Njoku, H. I. (2019). Assessment of heavy metal in domestic waters in four local government area of Osun State,Nigeria. Obafemi Awolowo University.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Njoku, Happiness Ihechi. Assessment of Heavy Metal in Domestic Waters in Four Local Government Area of Osun State,Nigeria. Obafemi Awolowo University, 2019.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Njoku, Happiness Ihechi. Assessment of Heavy Metal in Domestic Waters in Four Local Government Area of Osun State,Nigeria. Obafemi Awolowo University, 2019.