APA (7th ed.) Citation

Opland. (1979). Koninklijke Shell (Den Haag).

Chicago Style (17th ed.) Citation

Opland. Koninklijke Shell (Den Haag). 1979.

MLA (8th ed.) Citation

Opland. Koninklijke Shell (Den Haag). 1979.

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