APA (7th ed.) Citation

Zijlstra, A. A. (1989). A radio study of planetary nebulae.

Chicago Style (17th ed.) Citation

Zijlstra, Albert A. A Radio Study of Planetary Nebulae. 1989.

MLA (9th ed.) Citation

Zijlstra, Albert A. A Radio Study of Planetary Nebulae. 1989.

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