APA (7th ed.) Citation

Grallert, W. (1961). Briefmarkenkatalog 1961 (o.A.). Verlag Enzyklopädie.

Chicago Style (17th ed.) Citation

Grallert, Wolfram. Briefmarkenkatalog 1961. o.A. Leipzig: Verlag Enzyklopädie, 1961.

MLA (8th ed.) Citation

Grallert, Wolfram. Briefmarkenkatalog 1961. o.A. Verlag Enzyklopädie, 1961.

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