Walker, G. (1987). Astronomical observations: An optical perspective. Cambridge University Press.
芝加哥风格引文Walker, G. Astronomical Observations: An Optical Perspective. Cambridge: Cambridge University Press, 1987.
MLA引文Walker, G. Astronomical Observations: An Optical Perspective. Cambridge University Press, 1987.
警告：这些引文格式不一定是100％准确.