APA (7th ed.) Citation

Blaschka, R. (1928). Blaschka, Rudolf Jan. 28, 1920 [extracts from Jan. 18, 1920 letter]. Zenodo.

Chicago Style (17th ed.) Citation

Blaschka, Rudolf. Blaschka, Rudolf Jan. 28, 1920 [extracts from Jan. 18, 1920 Letter]. Zenodo, 1928.

MLA (9th ed.) Citation

Blaschka, Rudolf. Blaschka, Rudolf Jan. 28, 1920 [extracts from Jan. 18, 1920 Letter]. Zenodo, 1928.

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