APA (7th ed.) Citation

Opoku, G., & unknown. (1990). Optimal power system VAr planning.

Chicago Style (17th ed.) Citation

Opoku, G., and unknown. Optimal Power System VAr Planning. 1990.

MLA (9th ed.) Citation

Opoku, G., and unknown. Optimal Power System VAr Planning. 1990.

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