Cita APA (7a ed.)

Repetti, W. (1981). The End of the First Manila Observatory: [1865-1945]. s.n.

Cita Chicago Style (17a ed.)

Repetti, W.C. The End of the First Manila Observatory: [1865-1945]. [Manila]: s.n, 1981.

Cita MLA (9a ed.)

Repetti, W.C. The End of the First Manila Observatory: [1865-1945]. s.n, 1981.