APA
Allen J. R. L., . (1968). Current ripples: their relation to patterns of water and sediment motion. Amsterdam: North-Holland Publishing Co.
Chicago
Allen John R L, . 1968. Current ripples: their relation to patterns of water and sediment motion. Amsterdam: North-Holland Publishing Co.
Harvard
Allen J. R. L., . (1968). Current ripples: their relation to patterns of water and sediment motion. Amsterdam: North-Holland Publishing Co.
MLA
Allen John R L, . Current ripples: their relation to patterns of water and sediment motion. Amsterdam: North-Holland Publishing Co. 1968.