For more practice with melodies like this one, see:
Horvit, Koozin, Nelson. Music for Ear Training, 4nd edition. (includes accompanying workbook and CD rom for dictation). This is a very useful resource, and can provide direct practice for dictation via the CD rom. Certain exercises allow the answers to be revealed so that you can check your progress.
Specific Study: Units 15 and 16
Ottman, Robert W. Music for Sight Singing, 9th edition. Pearson Prentice Hall.
Specific Study: Chapters 14 and 19