APA-referens

Barlow, C. W. C. (1892). Mathematical astronomy. University correspondence college.

Chicago-stil citat

Barlow, Crossley William Crosby. Mathematical Astronomy. London: University correspondence college, 1892.

MLA-referens

Barlow, Crossley William Crosby. Mathematical Astronomy. University correspondence college, 1892.

Varning: dessa hänvisningar är inte alltid fullständigt riktiga.