APA (7th ed.) Citation

(1969). Specification for permanent blue-black writing ink for dip-pens. bureau of ceylon standards.

Chicago Style (17th ed.) Citation

Specification for Permanent Blue-black Writing Ink for Dip-pens. Colombo: bureau of ceylon standards, 1969.

MLA (9th ed.) Citation

Specification for Permanent Blue-black Writing Ink for Dip-pens. bureau of ceylon standards, 1969.

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