APA (7th ed.) Citation

Middeldorf, U. (1981). Fifty mortars: A catalogue. SPES.

Chicago Style (17th ed.) Citation

Middeldorf, Ulrich. Fifty Mortars: A Catalogue. Firenze: SPES, 1981.

MLA (9th ed.) Citation

Middeldorf, Ulrich. Fifty Mortars: A Catalogue. SPES, 1981.

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