Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (8a ed.)

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