Bolivar, J. D. (1987). A proposed syllabus and teaching material in economic geography for the secondary school. s.n.
Chicago-Zitierstil (17. Ausg.)Bolivar, Juliana D. A Proposed Syllabus and Teaching Material in Economic Geography for the Secondary School. s.l: s.n, 1987.
MLA-Zitierstil (9. Ausg.)Bolivar, Juliana D. A Proposed Syllabus and Teaching Material in Economic Geography for the Secondary School. s.n, 1987.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.