APA (7th ed.) Citation

Johnson, L. G. (1964). Theory and technique of variation research / by L.G. Johnson. Elsevier.

Chicago Style (17th ed.) Citation

Johnson, L. G. Theory and Technique of Variation Research / by L.G. Johnson. Elsevier, 1964.

MLA (9th ed.) Citation

Johnson, L. G. Theory and Technique of Variation Research / by L.G. Johnson. Elsevier, 1964.

Warning: These citations may not always be 100% accurate.