Twenty years ago :
from the journal of a girl in her teens /
edited by the author of "John Halifax, gentleman."
Craik, D. Maria Mulock. (18701879). Twenty years ago: from the journal of a girl in her teens. New York: Harper.
Craik, Dinah Maria Mulock, 1826-1887. Twenty Years Ago: From the Journal of a Girl In Her Teens. New York: Harper, 18701879.
Warning: These citations may not always be complete (especially for serials).