APA (7th ed.) Citation

Silk, J. (1993). Galaxy formation and the Hubble sequence. North-Holland.

Chicago Style (17th ed.) Citation

Silk, Joseph. Galaxy Formation and the Hubble Sequence. Amsterdam: North-Holland, 1993.

MLA (9th ed.) Citation

Silk, Joseph. Galaxy Formation and the Hubble Sequence. North-Holland, 1993.

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