APA (7th ed.) Citation

Sumitomo... (1980). Sumitomo oil country tubular goods. Sumitomo Metals Industries.

Chicago Style (17th ed.) Citation

Sumitomo... Sumitomo Oil Country Tubular Goods. Sumitomo Metals Industries, 1980.

MLA (8th ed.) Citation

Sumitomo... Sumitomo Oil Country Tubular Goods. Sumitomo Metals Industries, 1980.

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