APA

Sansom I. J., Smith M. P., Armstrong & Smith M. M.Presence of the earliest vertebrate hard tissues in conodonts. : .

Chicago

Sansom I J, Smith M P, Armstrong and Smith M M.Presence of the earliest vertebrate hard tissues in conodonts. : .

Harvard

Sansom I. J., Smith M. P., Armstrong and Smith M. M.Presence of the earliest vertebrate hard tissues in conodonts. : .

MLA

Sansom I J, Smith M P, Armstrong and Smith M M.: . .