Which citation is correct?

A. Keller writes, “The journey, which I remember well was very pleasant” (Keller 11).
B. Keller writes, “The journey, which I remember well was very pleasant (11).”
C. Keller writes, “The journey, which I remember well was very pleasant” (11).
D. “Keller writes, The journey, which I remember well was very pleasant” (Keller 11).