University College of Addis Ababa. Geophysical Observatory & Haile Sellassie I University. Geophysical Observatory. (1959). Bulletin of the Geophysical Observatory. University College Press.
Chicagoスタイル(17版)引用形式University College of Addis Ababa. Geophysical Observatory , Haile Sellassie I University. Geophysical Observatory. Bulletin of the Geophysical Observatory. Addis Ababa: University College Press, 1959.
MLA(8版)引用形式University College of Addis Ababa. Geophysical Observatory , Haile Sellassie I University. Geophysical Observatory. Bulletin of the Geophysical Observatory. University College Press, 1959.
警告: この引用は必ずしも正確ではありません.