Citazione Stile APA (7a Edizione)

Walker, G. (1987). Astronomical observations: An optical perspective. Cambridge University Press.

Citazione stile Chigago Style (17a edizione)

Walker, G. Astronomical Observations: An Optical Perspective. Cambridge: Cambridge University Press, 1987.

Citatione MLA (9a ed.)

Walker, G. Astronomical Observations: An Optical Perspective. Cambridge University Press, 1987.