APA (7th ed.) Citation

Grallert, W., & Waldemar Gruschke. (1971). Lexikon Philatelie (o.A.). Transpress.

Chicago Style (17th ed.) Citation

Grallert, Wolfram, and Waldemar Gruschke. Lexikon Philatelie. o.A. Berlin: Transpress, 1971.

MLA (8th ed.) Citation

Grallert, Wolfram, and Waldemar Gruschke. Lexikon Philatelie. o.A. Transpress, 1971.

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