APA (7. basım) Alıntı

Bolivar, J. D. (1987). A proposed syllabus and teaching material in economic geography for the secondary school. s.n.

Chicago Style (17. basım) Atıf

Bolivar, Juliana D. A Proposed Syllabus and Teaching Material in Economic Geography for the Secondary School. s.l: s.n, 1987.

MLA (9th ed.) Atıf

Bolivar, Juliana D. A Proposed Syllabus and Teaching Material in Economic Geography for the Secondary School. s.n, 1987.