APA (7th ed.) Citation

(1935). Postkarte Joh. Hevelius Danziger Ratsherr u. Astronom. [s.n..

Chicago Style (17th ed.) Citation

Postkarte Joh. Hevelius Danziger Ratsherr U. Astronom. Danzig: [s.n., 1935.

MLA (9th ed.) Citation

Postkarte Joh. Hevelius Danziger Ratsherr U. Astronom. [s.n., 1935.

Warning: These citations may not always be 100% accurate.