APA (7th ed.) Citation

Halstrick, L. (1948). Erythema nodosum syphiliticum.

Chicago Style (17th ed.) Citation

Halstrick, Lothar. Erythema Nodosum Syphiliticum. o.O, 1948.

MLA (9th ed.) Citation

Halstrick, Lothar. Erythema Nodosum Syphiliticum. 1948.

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