APA (7e ed.) Bronvermelding

Graaff, W. J. E. v. d. (1971). Three upper carboniferous, limestone-rich, high-destructive delta systems: With submarine fan deposits, Cantabrian Mountains, Spain. Rijksuniversiteit Groningen.

Chicago (17e ed.) Bronvermelding

Graaff, Willem Jacob Evert van de. Three Upper Carboniferous, Limestone-rich, High-destructive Delta Systems: With Submarine Fan Deposits, Cantabrian Mountains, Spain. [Groningen: Rijksuniversiteit Groningen, 1971.

MLA (8e ed.) Bronvermelding

Graaff, Willem Jacob Evert van de. Three Upper Carboniferous, Limestone-rich, High-destructive Delta Systems: With Submarine Fan Deposits, Cantabrian Mountains, Spain. Rijksuniversiteit Groningen, 1971.