Cita APA (7a ed.)

University College of Addis Ababa. Geophysical Observatory & Haile Sellassie I University. Geophysical Observatory. (1959). Bulletin of the Geophysical Observatory. University College Press.

Cita Chicago Style (17a ed.)

University College of Addis Ababa. Geophysical Observatory y Haile Sellassie I University. Geophysical Observatory. Bulletin of the Geophysical Observatory. Addis Ababa: University College Press, 1959.

Cita MLA (8a ed.)

University College of Addis Ababa. Geophysical Observatory y Haile Sellassie I University. Geophysical Observatory. Bulletin of the Geophysical Observatory. University College Press, 1959.