APA (7th ed.) Citation

Grallert, W., & Gruschke, W. (1977). Philatelie (4., unveränd. Aufl.). Transpress.

Chicago Style (17th ed.) Citation

Grallert, Wolfram, and Waldemar Gruschke. Philatelie. 4., unveränd. Aufl. Berlin: Transpress, 1977.

MLA (8th ed.) Citation

Grallert, Wolfram, and Waldemar Gruschke. Philatelie. 4., unveränd. Aufl. Transpress, 1977.

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