$40.$ At the end of a block quote,

a$.$ Cite the quoted source in parentheses after the final punctuation mark.

b$.$ Cite the quoted source in parentheses before the final punctuation mark.

c$.$ Use a footnote with a superscript number and cite the quoted source in the footnote.

d$.$ None of the above is correct.

$41.$ A reference list entry should have

a$.$ The author$$s surname and initials in inverted order $($e$.$g$.,$ McMahon, P$.$M$.).$

b$.$ The title of the article, page number, ISBN code, and book title.

c$.$ The author$$s surname only.

d$.$ Only b and c$.$