(1974). X-Ray astronomy. D. Reidel.
Chicago Style (17th ed.) ZitazioaX-Ray Astronomy. Dordrecht, Holland: D. Reidel, 1974.
MLA (9th ed.) ZitazioaX-Ray Astronomy. D. Reidel, 1974.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.
(1974). X-Ray astronomy. D. Reidel.
Chicago Style (17th ed.) ZitazioaX-Ray Astronomy. Dordrecht, Holland: D. Reidel, 1974.
MLA (9th ed.) ZitazioaX-Ray Astronomy. D. Reidel, 1974.