Guys what are other ways to spell tzar? ?

Which of the following citations correctly follows mla guidelines? a. tanya somanader. "we are stronger because we aredemocracies': president obama addresses the people ofestonia." the white house blog 3 sept. 2014. print. 4 sept. 2014.b. "we are stronger because we are democracies': presidentobama addresses the people of estonia" by tanya somanader.the white house blog 3 sept. 2014. web. 4 sept. 2014.c. somanader, tanya. "we are stronger because we aredemocracies': president obama addresses the people ofestonia." the white house blog 3 sept. 2014. web. 4 sept. 2014d. somanader, tanya. the white house blog. "we are strongbecause we are democracies: president obama addresses thepeople of estonia." 3 sept. 2014. web. 4 sept. 2014.

Which part of the original work should the adaptation retain

Which pair of words has similar denotation but different connotations?