APA
First World Congress Of Pythagorean Organizations (Athens), First World Congress Of Pythagorean Organizations (Athens), . (1957). Proceedings ed by George Sakellariou. : .
Chicago
First World Congress Of Pythagorean Organizations (Athens), First World Congress Of Pythagorean Organizations (Athens), . 1957. Proceedings ed by George Sakellariou. : .
Harvard
First World Congress Of Pythagorean Organizations (Athens), First World Congress Of Pythagorean Organizations (Athens), . (1957). Proceedings ed by George Sakellariou. : .
MLA
First World Congress Of Pythagorean Organizations (Athens), First World Congress Of Pythagorean Organizations (Athens), . Proceedings ed by George Sakellariou. : . 1957.
