APA (7th ed.) Citation

Berthold, V. M. The Die Varieties of the Nesbitt Series of United States Envelopes.

Chicago Style (17th ed.) Citation

Berthold, Victor Maximilian. The Die Varieties of the Nesbitt Series of United States Envelopes.

MLA (9th ed.) Citation

Berthold, Victor Maximilian. The Die Varieties of the Nesbitt Series of United States Envelopes.

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