APA

Lang K. R., . (1979). A source book in astronomy and astrophysics. Cambridge, Mass. [u.a.]: Harvard Univ. Press.

Chicago

Lang Kenneth R, . 1979. A source book in astronomy and astrophysics. Cambridge, Mass. [u.a.]: Harvard Univ. Press.

Harvard

Lang K. R., . (1979). A source book in astronomy and astrophysics. Cambridge, Mass. [u.a.]: Harvard Univ. Press.

MLA

Lang Kenneth R, . A source book in astronomy and astrophysics. Cambridge, Mass. [u.a.]: Harvard Univ. Press. 1979.