APA (7th ed.) Citation

Bielfeldt, A., & Walsemann, E. (1912). Altonaer Stadtkalender. Hammerich & Lesser.

Chicago Style (17th ed.) Citation

Bielfeldt, August, and Edgar Walsemann. Altonaer Stadtkalender. Altona: Hammerich & Lesser, 1912.

MLA (8th ed.) Citation

Bielfeldt, August, and Edgar Walsemann. Altonaer Stadtkalender. Hammerich & Lesser, 1912.

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