गीता सुगीता कर्तव्या किमन्यैः शास्त्रविस्तरैः ।
या स्वयं पद्मनाभस्य मुखपद्माद्विनिःसृता ॥

Meaning:
What other shastras are required for those who read the beautiful / Divine Gita since they have heard it from the Lord himself libido-de.com.

Word meanings:
गीता = the book bhagavatgita;
सुगीता = well sung one;
कर्तव्या = needed, required;
किमन्यैः = what other;
शास्त्रविस्तरैः = by the details of the bookish knowledge;
या = She who;
स्वयं = by oneself ; by one’s own efforts;
पद्मनाभस्य = Padmanabha’s;
मुखपद्माद्विनिःसृता = emanating from the lotus mouth of;