Walker, G. (1987). Astronomical observations: An optical perspective. Cambridge University Press.
Citación estilo ChicagoWalker, G. Astronomical Observations: An Optical Perspective. Cambridge: Cambridge University Press, 1987.
Cita MLAWalker, G. Astronomical Observations: An Optical Perspective. Cambridge University Press, 1987.
Warning: These citations may not always be 100% accurate.