MLA

Cook, William, d. 1824. The life of Samuel Johnson, LL.D. : with occasional remarks on his writings, an authentic copy of his will, and a catalogue of his works : to which are added, some papers written by Dr. Johnson, in behalf of a late unfortunate character, never before published. 1785. https://collections.library.yale.edu/catalog/2046924.

APA, 6th edition

Cook, William, d. 1824. (1785)[The life of Samuel Johnson, LL.D. : with occasional remarks on his writings, an authentic copy of his will, and a catalogue of his works : to which are added, some papers written by Dr. Johnson, in behalf of a late unfortunate character, never before published]. https://collections.library.yale.edu/catalog/2046924.