APA (7th ed.) Citation

Nagel, R. Achegas de heráldica portuguesa.

Chicago Style (17th ed.) Citation

Nagel, Rolf. Achegas De Heráldica Portuguesa.

MLA (8th ed.) Citation

Nagel, Rolf. Achegas De Heráldica Portuguesa.

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