Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.