APA aipamena

Harlan, G. C. (1889). Periscopic Cylindrical and Sphero-cylindrical Glasses.

Chicago Style aipamena

Harlan, George C. Periscopic Cylindrical and Sphero-cylindrical Glasses. 1889.

MLA aipamena

Harlan, George C. Periscopic Cylindrical and Sphero-cylindrical Glasses. 1889.