APA (7th ed.) Citation

Oppolzer, T. v. (1887). Canon der Finsternisse.

Chicago Style (17th ed.) Citation

Oppolzer, Theodor von. Canon Der Finsternisse. Wien, 1887.

MLA (9th ed.) Citation

Oppolzer, Theodor von. Canon Der Finsternisse. 1887.

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