APA (7th ed.) Citation

Gratton, L. (1969). Ground based observations of X-ray sources - a short review.

Chicago Style (17th ed.) Citation

Gratton, Livio. Ground Based Observations of X-ray Sources - a Short Review. Frascati, 1969.

MLA (9th ed.) Citation

Gratton, Livio. Ground Based Observations of X-ray Sources - a Short Review. 1969.

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