APA (7th ed.) Citation

Steffens, R. (1971). Les sols de la Lorraine Belge.

Chicago Style (17th ed.) Citation

Steffens, Raymond. Les Sols De La Lorraine Belge. Bonn, 1971.

MLA (9th ed.) Citation

Steffens, Raymond. Les Sols De La Lorraine Belge. 1971.

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