توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

OLU OBI, A., ADEPETU, J., & UPONI, J. (2020). CROP TOLERANCE OF SOIL ACIDITY RESULTING FROM LONG-TERM CONTINUOUS APPLICATION OF NITROGEN FERTILIZERS. The Faculty of Agriculture Obafemi Awolowo University, Ile-Ife, Nigeria.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

OLU OBI, A., J.A ADEPETU, و J.l UPONI. CROP TOLERANCE OF SOIL ACIDITY RESULTING FROM LONG-TERM CONTINUOUS APPLICATION OF NITROGEN FERTILIZERS. The Faculty of Agriculture Obafemi Awolowo University, Ile-Ife, Nigeria, 2020.

توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)

OLU OBI, A., et al. CROP TOLERANCE OF SOIL ACIDITY RESULTING FROM LONG-TERM CONTINUOUS APPLICATION OF NITROGEN FERTILIZERS. The Faculty of Agriculture Obafemi Awolowo University, Ile-Ife, Nigeria, 2020.