APA (7th ed.) Citation

(1970). 2 cop: Resp. green/black and purple/pink. Year of publ. 1970 or 1974.

Chicago Style (17th ed.) Citation

2 Cop: Resp. Green/black and Purple/pink. Year of Publ. 1970 or 1974. 1970.

MLA (8th ed.) Citation

2 Cop: Resp. Green/black and Purple/pink. Year of Publ. 1970 or 1974. 1970.

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