APA (7th ed.) Citation

Johannesburg. Union Observatory. Observatory circulars. [publisher not identified].

Chicago Style (17th ed.) Citation

Johannesburg. Union Observatory. Observatory Circulars. Johannesburg: [publisher not identified].

MLA (9th ed.) Citation

Johannesburg. Union Observatory. Observatory Circulars. [publisher not identified].

Warning: These citations may not always be 100% accurate.