APA
Ummerkutty A. N. P., . (1907). Science of the ocean. National book trust, India: .
Chicago
Ummerkutty A N P, . 1907. Science of the ocean. National book trust, India: .
Harvard
Ummerkutty A. N. P., . (1907). Science of the ocean. National book trust, India: .
MLA
Ummerkutty A N P, . Science of the ocean. National book trust, India: . 1907.