Παραπομπή σε μορφή APA (7η εκδ.)

AYUBA, I. G. U. (2009). Essentials of population studies in urban and regional planning practice. Umahi Publishers.

Παραπομπή σε μορφή Chicago (17η εκδ.)

AYUBA, Ijeoma Georgiana Umahi. Essentials of Population Studies in Urban and Regional Planning Practice. Umahi Publishers, 2009.

Παραπομπή σε μορφή MLA (9th εκδ.)

AYUBA, Ijeoma Georgiana Umahi. Essentials of Population Studies in Urban and Regional Planning Practice. Umahi Publishers, 2009.