APA (7th ed.) Citation

Petronor. (1969). Informe Anual. Petronor.

Chicago Style (17th ed.) Citation

Petronor. Informe Anual. Somorrostro: Petronor, 1969.

MLA (9th ed.) Citation

Petronor. Informe Anual. Petronor, 1969.

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