American Psychological Association 6th edition

HUMPHRIES, P. J., & SEMPLE, C. (2009). Note on the hybridization number and subtree distance in phylogenetics. Applied Mathematics Letters, 22(4), 611-615.

ISO-690 (author-date, English)

HUMPHRIES, Peter J and SEMPLE, Charles, 2009. Note on the hybridization number and subtree distance in phylogenetics. Applied mathematics letters. 1 January 2009. Vol. 22, no. 4, p. 611-615.

Modern Language Association 9th edition

HUMPHRIES, P. J., and C. SEMPLE. “Note on the Hybridization Number and Subtree Distance in Phylogenetics”. Applied Mathematics Letters, vol. 22, no. 4, Jan. 2009, pp. 611-5.

Mohr Siebeck - Recht (Deutsch - Österreich)

HUMPHRIES, Peter J/SEMPLE, Charles: Note on the hybridization number and subtree distance in phylogenetics, Applied mathematics letters 2009, 611-615.

Emerald - Harvard

HUMPHRIES, P.J. and SEMPLE, C. (2009), “Note on the hybridization number and subtree distance in phylogenetics”, Applied Mathematics Letters, Vol. 22 No. 4, pp. 611-615.

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