APA (7th ed.) Citation

Cayne, B. S. (1973). The Encyclopedia Americana: International edition; complete in 30 volumes, first published in 1829 Bd. 21 Orley to Photographic Telescope. The Encyclopedia Americana : the international reference work ; complete in thirty volumes, first published in 1829, 21.1973.

Chicago Style (17th ed.) Citation

Cayne, Bernard S. "The Encyclopedia Americana: International Edition; Complete in 30 Volumes, First Published in 1829 Bd. 21 Orley to Photographic Telescope." The Encyclopedia Americana : The International Reference Work ; Complete in Thirty Volumes, First Published in 1829 1973: 21.1973.

MLA (8th ed.) Citation

Cayne, Bernard S. "The Encyclopedia Americana: International Edition; Complete in 30 Volumes, First Published in 1829 Bd. 21 Orley to Photographic Telescope." The Encyclopedia Americana : The International Reference Work ; Complete in Thirty Volumes, First Published in 1829, 1973, p. 21.1973.