Cooper, W. A., & Walker, E. N. (1989). Getting the measure of the stars. Bristol: Adam Hilger.
Παραπομπή Chicago StyleCooper, W. A., and E. N. Walker. Getting the Measure of the Stars. Bristol: Adam Hilger, 1989.
Παραπομπή MLACooper, W. A., and E. N. Walker. Getting the Measure of the Stars. Bristol: Adam Hilger, 1989.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.