APA Style
Ed. Murray, Wallace, S. (1977).
Encyclopedia Americana. Vol.21. Orley to photographic telescope .
Canada:
Americana Corporation.
Chicago Style
Ed. Murray, Wallace, S.
Encyclopedia Americana. Vol.21. Orley to photographic telescope.
Canada:
Americana Corporation,
1977.
Referensi.
MLA Style
Ed. Murray, Wallace, S.
Encyclopedia Americana. Vol.21. Orley to photographic telescope.
Canada:
Americana Corporation,
1977.
Referensi.
Turabian Style
Ed. Murray, Wallace, S.
Encyclopedia Americana. Vol.21. Orley to photographic telescope.
Canada:
Americana Corporation,
1977.
Referensi.